Domestic refrigerator sizing: Select the typical capacity range (in tonnes of refrigeration, TR) for a household refrigerator.

Introduction / Context:
Household refrigerators are small refrigeration units compared to comfort-cooling or industrial systems. Knowing the typical capacity range helps students relate theory to real appliances.

Given Data / Assumptions:

• Capacity is quoted in tonnes of refrigeration (TR), where 1 TR = 3.517 kW of cooling.
• Domestic fridges serve small enclosures with intermittent door openings.

Concept / Approach:
Compact, insulated household units require modest cooling capacities, far below split ACs or chillers. Typical single-door and double-door home refrigerators fall in the fraction-of-a-ton range.

Step-by-Step Solution:

Verification / Alternative check:
Compare to room air conditioners (commonly 1–2 TR): far larger than a fridge. Industrial or central plant capacities (3–7 TR and above) are orders of magnitude higher.

Why Other Options Are Wrong:

1–3 TR and above represent space conditioning or small commercial refrigeration, not typical household units.0.5–1.0 TR still overestimates most domestic fridges.

Common Pitfalls:
Confusing electrical power (kW input) with cooling capacity (kW or TR). Always compare like quantities.

Final Answer:

0.1 to 0.3 TR